Improvement in saw-mills



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JOHN C. DELAVIGNE, OF NEW ORLEANS, LOUISIANA.

Letters Patent No. @7,275, dated July 30, 1867.

IMPROVEMENT IN SAW-MILLS..

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TO ALL WHOM IT MAY CONCERN Be it known that I, JOHN C, DELAVIGNE, of New Orleans, parish of Orleans, Louisiana, have invented a new and useful Improvement in Saw-Mill; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure I is a side elevation of my improved walking-beam saw-mill.

.Figure 2 is a transverse sectional view of the same, taken in the line z x, fig. 1.

Figure 3 isla. detached side view Vof the walking-beam and saw.

Figure 41's an end view of the same detail, and

Figure 5 a top view of the saw-mill carsiage, detached.

Similar letters of reference indicate corresponding parts.

This invention relates to an improvement in a reciprocating saw-mill, and consists in connecting the saw or saws with awalking-bearn to produce their motion, in connection with springs, which are depressed by each end of the Walking-beam alternately, and react to aid in lifting each end alternately. The suwgate of ordlnary saw-mills is thus dispensed with advantageously, resulting in a great economy of power; steadier motion; freedom from jar and shaking common to saw-mills and heating of the gate-slides; and facility for connecting directly the piston of a steam engine or other power.

A represents the frame of' a saw-mill of ordinary construction, as regards all its parts except those of my invention, and none, therefore, are referred to further than is necessary for the explanation of my improvements. B' represents a large driving-pulley, connected` by belt m with a small pulley, C, on the crank-shaft a, which may carry a ily-wheel. The crank-disk D on the other side oi' the shaft a is connected by a pitmamE, with the lower cross-bar b o f a walking-beam frame, F, suspended by pivots c, on both sides of the mill-frame, to beam G. On one end ofthe walking-beam frame F is axed the saw H` and connected with it also is the pawl d, working in the ratchet-wheel I, to give the 'fecdmotiom Each end of the walking-beam frame F is connected below, by link-bars e e, with long spring-boards K K, which are depressed alternately as the ends of the walking-beam frame descend, and by their reacting power assist the reciprocating motion upwards, and downwards at the turn, and steady the working of the saw.

Instead of a pulley and crank connection, the piston of a steam engine may be directly attached to the walking-beam ot' frame, and various modifications .of the machinery maybe adapted to operate the wa1kingbeam frame.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent- 1. The pivoted walking-beam frame F, having at one end the saw H, its lower cross-barb connected to one end of pitman E, whose outer end is pivoted concentrically to disk D on shaft a, when'all are constructed, arranged, and operating as herein set forth, for the purpose speciiied.

2. The spring-boards K K, pivoted by link-bars e e to each end of the walking-beam frame F, as herein set forth, for the purpose specified.

JNOO. DELAVIGNE.

Witnesses:

C. W. CULBER'rsoN, G. DE FERIET. 

